Add script which adds dynamically linked bins with libs

script/add-dyn-exe.sh

@@ -0,0 +1,61 @@
+#!/bin/sh -eu
+
+help="$0 [-i] <initrd-root> <exe>"
+
+while getopts ':ih' opt; do
+        case $opt in
+                i)
+                        is_init=true
+                        ;;
+                h)
+                        echo $help >&2
+                        exit 0
+                        ;;
+                \?)
+                        echo "-$OPTARG unknown" >&2
+                        echo $help >&2
+                        exit 1
+                        ;;
+        esac
+done
+
+shift $((OPTIND - 1))
+
+if [ $# -lt 2 ]; then
+        echo "Expected 2 arguments got $#" >&2
+        echo $help >&2
+        exit 1
+fi
+
+rootdir=$(realpath $1)
+path_or_name=$2
+path=
+
+if [ -f $path_or_name ]; then
+        path=$(realpath $path_or_name)
+else
+        path=$(whereis -b $path_or_name | awk '{ print $2 }')
+fi
+
+if [ ! -f $path ]; then
+        echo "Could not resolve $path_or_name to a file (got $path)"
+        exit 1;
+fi
+
+libs=$(ldd $path | awk 'NF > 3 { print $3 }')
+
+mkdir -p $rootdir$(dirname $path)
+rsync --progress $path $rootdir$path
+ln -fvs $rootdir$path $rootdir/bin/$(basename $path)
+
+interp=$(readelf -p .interp $path | grep -o '/.*')
+rsync --progress $interp $rootdir$interp
+
+if [ $is_init ]; then
+        ln -fvs $rootdir$path $rootdir/init
+fi
+
+for lib in $libs; do
+        mkdir -p $rootdir$(dirname $lib)
+        rsync --progress $lib $rootdir/$lib
+done